Note 2023 is the last year that I will maintain this site--there is currently no plan to continue it after that.

Peter Grobstich

A titan, as defined by Samuel Yates, is anyone who has found a titanic prime. This page provides data on those that have found these primes. The data below only reflects on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

Proof-code(s):	g267, p162
E-mail address:	peter.grobstich@hs-nb.de
Username	Grobstich	(entry created on 1/11/2002 06:43:30 CDT)
Database id:	344	(entry last modified on 3/28/2006 11:16:17 CDT)
Active primes:	on current list: 4 (unweighted total: 4), rank by number 220
Total primes:	number ever on any list: 369.333 (unweighted total: 370)
Production score:	for current list 46 (normalized: 4), total 46.3977, rank by score 669
Largest prime:	17 · 2^1990299 + 1 ‏(‎599141 digits) via code g267 on 3/16/2006 01:49:28 CDT
Most recent:	31735 · 2⁴⁰⁴⁸⁷⁴ + 1 ‏(‎121884 digits) via code g267 on 3/23/2009 08:29:53 CDT
Entrance Rank:	mean 24.50 (minimum 17, maximum 36)

Descriptive Data: (report abuse)

I work as professor at the University of Applied Sciences in Neubrandenburg /Germany. My subjects are Mathematics and Computer-Algebra-Systems. I use to prove primes these programs: NewPGen, PRP and Proth.

Surname: Grobstich (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.

I am Peter Grobstich and I would like to

(Reuse an old code if your are using the same programs, projects... Only create a new code if you are doing something differently than in the past. Duplicate codes will be merged.